Removing prerender dead code.

chrome/browser/prerender/prerender_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <string>
 #include <vector>
@@ skipping 44 matching lines @@
 
 using content::BrowserThread;
 using content::RenderViewHost;
 using content::SessionStorageNamespace;
 using content::WebContents;
 
 namespace prerender {
 
 namespace {
 
-// Time window for which we will record windowed PLT's from the last
-// observed link rel=prefetch tag.
-const int kWindowDurationSeconds = 30;
-
 // Time interval at which periodic cleanups are performed.
 const int kPeriodicCleanupIntervalMs = 1000;
 
 // Time interval before a new prerender is allowed.
 const int kMinTimeBetweenPrerendersMs = 500;
 
 // Valid HTTP methods for prerendering.
 const char* const kValidHttpMethods[] = {
   "GET",
   "HEAD",
@@ skipping 1145 matching lines @@
   if (!render_process_host || !render_process_host->GetBrowserContext())
     return NULL;
   Profile* profile = Profile::FromBrowserContext(
       render_process_host->GetBrowserContext());
   if (!profile)
     return NULL;
   return PrerenderManagerFactory::GetInstance()->GetForProfile(profile);
 }
 
 }  // namespace prerender